QUESTION

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A cylindrical, skirt with a height of 3 m, diameter of 3 m, and thickness of 10 mm is being designed to support the vessel and its content (water, density of approximately 1000 kg/m3). The following materials for the construction of the skirt are available (see Table 3):


Table 3 \begin{tabular}{|l|c|c|c|} \hline \multicolumn{1}{|c|}{ Material } & $E$ [GPa] & $\begin{array}{c}\text { Maximum allowable design } \\ \text { stress [MPa] }\end{array}$ & $\begin{array}{c}\text { Welding joint } \\ \text { factor }\end{array}$ \\ \hline Cast iron & 160 & 135 & 0.85 \\ \hline Stainless steel & 220 & 340 & 0.95 \\ \hline Aluminium & 35 & 95 & 1 \\ \hline Brass & 40 & 120 & 0.9 \\ \hline \end{tabular}
1.Assuming that the bending stress within the skirt wall due to the wind is equal to 60 MPa and that the weight of the empty vessel being supported is 100 tonnes, calculate the compressive and tensile stresses within the wall of the skirt when the vessel is full of water.

2. Hence, select all the suitable materials that ensure a safe design of the skirt under operating conditions (supported vessel full of water).

3.How would your choice on material selection be affected if the vessel was empty?


3.

Public Answer

8AGRAD The First Answerer